以伪分布式模式停止运行Hadoop示例 [英] Running Hadoop examples halt in Pseudo-Distributed mode

问题描述

在独立模式下，每件事都运行良好，当进入伪分布式模式时，HDFS运行良好，我可以将文件放入HDFS并进行浏览.我还检查了活动节点列表中是否有一个DataNode.

Every thing run well in Standalone mode and when going to the pseudo-distributed mode, the HDFS works well, I can put files to HDFS and browse it. And I also checked that there is one DataNode in the live nodes lists.

但是，当我运行 bin/hadoop jar hadoop-*-examples.jar grep输入输出'dfs [a-z.] +'时，程序只是停在那里而没有产生任何错误.从 http://ereg.adobe.com:50070/dfsnodelist.jsp?whatNodes=LIVE 可以看到，该DataNode上没有任何运行.

However, when I run bin/hadoop jar hadoop-*-examples.jar grep input output 'dfs[a-z.]+', the program just halt there without producing any error. And from http://ereg.adobe.com:50070/dfsnodelist.jsp?whatNodes=LIVE I can see that nothing has ever been run on that DataNode.

我遵循了本教程中有关这些xml conf文件的配置.那么，有人对我可能犯的其他错误有任何想法吗?B.T.W，我正在Mac OS X上运行这些东西.

I followed the configuration in the tutorial for those xml conf files. So anyone have any idea about what other mistakes I might have made? B.T.W, I'm running the stuffs on Mac OS X.

推荐答案

通过暂停，您是说它挂了，还是只是默默地返回了?对于Mapreduce问题，您应该检查JobTracker的网页(端口50030)以查看已提交作业的状态.

By halt, do you mean it hangs, or that it just silently returns? For Mapreduce issues, you should check the JobTracker's webpage (at port 50030) to see the status of the submitted job.

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